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<FONT color="green">001</FONT>    <a name="line.1"></a>
<FONT color="green">002</FONT>    /*<a name="line.2"></a>
<FONT color="green">003</FONT>     * Copyright (C) 2011 Archie L. Cobbs. All rights reserved.<a name="line.3"></a>
<FONT color="green">004</FONT>     *<a name="line.4"></a>
<FONT color="green">005</FONT>     * $Id: LoggingApplication.html 61 2011-03-10 15:40:08Z archie.cobbs $<a name="line.5"></a>
<FONT color="green">006</FONT>     */<a name="line.6"></a>
<FONT color="green">007</FONT>    <a name="line.7"></a>
<FONT color="green">008</FONT>    package org.dellroad.stuff.vaadin;<a name="line.8"></a>
<FONT color="green">009</FONT>    <a name="line.9"></a>
<FONT color="green">010</FONT>    import com.vaadin.Application;<a name="line.10"></a>
<FONT color="green">011</FONT>    import com.vaadin.terminal.ErrorMessage;<a name="line.11"></a>
<FONT color="green">012</FONT>    import com.vaadin.terminal.ParameterHandler;<a name="line.12"></a>
<FONT color="green">013</FONT>    import com.vaadin.terminal.SystemError;<a name="line.13"></a>
<FONT color="green">014</FONT>    import com.vaadin.terminal.Terminal;<a name="line.14"></a>
<FONT color="green">015</FONT>    import com.vaadin.terminal.URIHandler;<a name="line.15"></a>
<FONT color="green">016</FONT>    import com.vaadin.terminal.VariableOwner;<a name="line.16"></a>
<FONT color="green">017</FONT>    import com.vaadin.terminal.gwt.server.ChangeVariablesErrorEvent;<a name="line.17"></a>
<FONT color="green">018</FONT>    import com.vaadin.ui.AbstractComponent;<a name="line.18"></a>
<FONT color="green">019</FONT>    import com.vaadin.ui.Window;<a name="line.19"></a>
<FONT color="green">020</FONT>    <a name="line.20"></a>
<FONT color="green">021</FONT>    import java.net.SocketException;<a name="line.21"></a>
<FONT color="green">022</FONT>    <a name="line.22"></a>
<FONT color="green">023</FONT>    import javax.servlet.http.HttpServletRequest;<a name="line.23"></a>
<FONT color="green">024</FONT>    <a name="line.24"></a>
<FONT color="green">025</FONT>    import org.slf4j.Logger;<a name="line.25"></a>
<FONT color="green">026</FONT>    import org.slf4j.LoggerFactory;<a name="line.26"></a>
<FONT color="green">027</FONT>    import org.springframework.web.context.request.RequestAttributes;<a name="line.27"></a>
<FONT color="green">028</FONT>    import org.springframework.web.context.request.RequestContextHolder;<a name="line.28"></a>
<FONT color="green">029</FONT>    <a name="line.29"></a>
<FONT color="green">030</FONT>    /**<a name="line.30"></a>
<FONT color="green">031</FONT>     * {@link Application} subclass that provides subclasses with a {@link Logger}<a name="line.31"></a>
<FONT color="green">032</FONT>     * and logs and displays any exceptions thrown in an overlay error window.<a name="line.32"></a>
<FONT color="green">033</FONT>     *<a name="line.33"></a>
<FONT color="green">034</FONT>     * @since 1.0.51<a name="line.34"></a>
<FONT color="green">035</FONT>     */<a name="line.35"></a>
<FONT color="green">036</FONT>    @SuppressWarnings("serial")<a name="line.36"></a>
<FONT color="green">037</FONT>    public abstract class LoggingApplication extends Application {<a name="line.37"></a>
<FONT color="green">038</FONT>    <a name="line.38"></a>
<FONT color="green">039</FONT>        public static final int NOTIFICATION_DELAY = 30000;<a name="line.39"></a>
<FONT color="green">040</FONT>    <a name="line.40"></a>
<FONT color="green">041</FONT>        protected final Logger log = LoggerFactory.getLogger(getClass());<a name="line.41"></a>
<FONT color="green">042</FONT>    <a name="line.42"></a>
<FONT color="green">043</FONT>        protected LoggingApplication() {<a name="line.43"></a>
<FONT color="green">044</FONT>        }<a name="line.44"></a>
<FONT color="green">045</FONT>    <a name="line.45"></a>
<FONT color="green">046</FONT>        @Override<a name="line.46"></a>
<FONT color="green">047</FONT>        public void terminalError(Terminal.ErrorEvent event) {<a name="line.47"></a>
<FONT color="green">048</FONT>    <a name="line.48"></a>
<FONT color="green">049</FONT>            // Get exception<a name="line.49"></a>
<FONT color="green">050</FONT>            final Throwable t = event.getThrowable();<a name="line.50"></a>
<FONT color="green">051</FONT>    <a name="line.51"></a>
<FONT color="green">052</FONT>            // Ignore client "hangups"<a name="line.52"></a>
<FONT color="green">053</FONT>            if (t instanceof SocketException) {<a name="line.53"></a>
<FONT color="green">054</FONT>                HttpServletRequest request = getCurrentRequest();<a name="line.54"></a>
<FONT color="green">055</FONT>                log.warn("socket exception talking to " + request.getRemoteAddr() + ":" + request.getRemotePort() + ": " + t);<a name="line.55"></a>
<FONT color="green">056</FONT>                return;<a name="line.56"></a>
<FONT color="green">057</FONT>            }<a name="line.57"></a>
<FONT color="green">058</FONT>    <a name="line.58"></a>
<FONT color="green">059</FONT>            // Log it<a name="line.59"></a>
<FONT color="green">060</FONT>            log.error("internal error in " + getClass().getSimpleName() + ": " + event, t);<a name="line.60"></a>
<FONT color="green">061</FONT>    <a name="line.61"></a>
<FONT color="green">062</FONT>            // Note: the following code was copied from Application.java...<a name="line.62"></a>
<FONT color="green">063</FONT>    <a name="line.63"></a>
<FONT color="green">064</FONT>            // Finds the original source of the error/exception<a name="line.64"></a>
<FONT color="green">065</FONT>            Object owner = null;<a name="line.65"></a>
<FONT color="green">066</FONT>            if (event instanceof VariableOwner.ErrorEvent)<a name="line.66"></a>
<FONT color="green">067</FONT>                owner = ((VariableOwner.ErrorEvent)event).getVariableOwner();<a name="line.67"></a>
<FONT color="green">068</FONT>            else if (event instanceof URIHandler.ErrorEvent)<a name="line.68"></a>
<FONT color="green">069</FONT>                owner = ((URIHandler.ErrorEvent)event).getURIHandler();<a name="line.69"></a>
<FONT color="green">070</FONT>            else if (event instanceof ParameterHandler.ErrorEvent)<a name="line.70"></a>
<FONT color="green">071</FONT>                owner = ((ParameterHandler.ErrorEvent)event).getParameterHandler();<a name="line.71"></a>
<FONT color="green">072</FONT>            else if (event instanceof ChangeVariablesErrorEvent)<a name="line.72"></a>
<FONT color="green">073</FONT>                owner = ((ChangeVariablesErrorEvent)event).getComponent();<a name="line.73"></a>
<FONT color="green">074</FONT>    <a name="line.74"></a>
<FONT color="green">075</FONT>            // Shows the error in AbstractComponent<a name="line.75"></a>
<FONT color="green">076</FONT>            if (owner instanceof AbstractComponent) {<a name="line.76"></a>
<FONT color="green">077</FONT>                AbstractComponent component = (AbstractComponent)owner;<a name="line.77"></a>
<FONT color="green">078</FONT>                if (t instanceof ErrorMessage)<a name="line.78"></a>
<FONT color="green">079</FONT>                    component.setComponentError((ErrorMessage)t);<a name="line.79"></a>
<FONT color="green">080</FONT>                else<a name="line.80"></a>
<FONT color="green">081</FONT>                    component.setComponentError(new SystemError(t));<a name="line.81"></a>
<FONT color="green">082</FONT>            }<a name="line.82"></a>
<FONT color="green">083</FONT>    <a name="line.83"></a>
<FONT color="green">084</FONT>            // Notify user<a name="line.84"></a>
<FONT color="green">085</FONT>            this.showError("Internal Error", "" + t);<a name="line.85"></a>
<FONT color="green">086</FONT>        }<a name="line.86"></a>
<FONT color="green">087</FONT>    <a name="line.87"></a>
<FONT color="green">088</FONT>        /**<a name="line.88"></a>
<FONT color="green">089</FONT>         * Display an error message to the user.<a name="line.89"></a>
<FONT color="green">090</FONT>         */<a name="line.90"></a>
<FONT color="green">091</FONT>        public void showError(String title, String description) {<a name="line.91"></a>
<FONT color="green">092</FONT>            Window.Notification notification = new Window.Notification(title, description, Window.Notification.TYPE_ERROR_MESSAGE);<a name="line.92"></a>
<FONT color="green">093</FONT>            notification.setStyleName("warning");<a name="line.93"></a>
<FONT color="green">094</FONT>            notification.setDelayMsec(NOTIFICATION_DELAY);<a name="line.94"></a>
<FONT color="green">095</FONT>            this.getMainWindow().showNotification(notification);<a name="line.95"></a>
<FONT color="green">096</FONT>        }<a name="line.96"></a>
<FONT color="green">097</FONT>    <a name="line.97"></a>
<FONT color="green">098</FONT>        /**<a name="line.98"></a>
<FONT color="green">099</FONT>         * Display an error message to the user caused by an exception.<a name="line.99"></a>
<FONT color="green">100</FONT>         */<a name="line.100"></a>
<FONT color="green">101</FONT>        public void showError(String title, Throwable t) {<a name="line.101"></a>
<FONT color="green">102</FONT>            for (int i = 0; i &lt; 100 &amp;&amp; t.getCause() != null; i++)<a name="line.102"></a>
<FONT color="green">103</FONT>                t = t.getCause();<a name="line.103"></a>
<FONT color="green">104</FONT>            this.showError(title, t.getClass().getSimpleName() + ": " + t.getMessage());<a name="line.104"></a>
<FONT color="green">105</FONT>        }<a name="line.105"></a>
<FONT color="green">106</FONT>    <a name="line.106"></a>
<FONT color="green">107</FONT>        public HttpServletRequest getCurrentRequest() {<a name="line.107"></a>
<FONT color="green">108</FONT>            RequestAttributes requestAttributes = RequestContextHolder.currentRequestAttributes();<a name="line.108"></a>
<FONT color="green">109</FONT>            return (HttpServletRequest)requestAttributes.getAttribute(<a name="line.109"></a>
<FONT color="green">110</FONT>              RequestAttributes.REFERENCE_REQUEST, RequestAttributes.SCOPE_REQUEST);<a name="line.110"></a>
<FONT color="green">111</FONT>        }<a name="line.111"></a>
<FONT color="green">112</FONT>    }<a name="line.112"></a>
<FONT color="green">113</FONT>    <a name="line.113"></a>




























































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